What exactly is a Total Solar Eclipse?

Solar Eclipses for Beginners: A useful guide, web-published by Fred Espenak, is a good place to begin learning about solar eclipses.

Wikipedia: Solar Eclipse


(C2 - or 2nd contact is the start of totality, and occurs at our observation site on Hikueru at approximately 18:37 UT, 12:37 MDT, 8:37 a.m. local time in Tahiti.  Totality will last for approximately 4 minutes and 19 seconds.)
 
NASA Eclipse Website: Interactive Google Map of TSE 2010 July 11 (You can click on the map to see local circumstances!)

(We will be keeping a close watch on this web resource in the days and hours leading up to the eclipse!  You can follow our anxiety too!)